Answer:
According to the current fossil record, scientists believe that the life on earth began about 3.5 billion years ago.
Answer:
rainfall, changes in water level, earthquakes
Answer:
It is a typical Hfr mating, as trp gene is very closed to F plasmid, the Hfr bacteria donates its trp gene along with F plasmid and then process is disturbed.
Explanation:
Answer:
and We were born just to die
The answer is PRODUCERS.
Plants are producers and perform photosynthesis.
They use the sunlight, that provides them with energy, and take the carbon dioxide from the atmosphere, that helps reducing it.
Photosynthesis is a way for them to make their own food (sugars), necessary for them to stay alive and to produce oxygen. Both will be needed for their cellular respiration, a process that occurs in the mitochondria, and will produce energy, in the form of ATP, and CO2.
The carbon dioxide that they produced in cellular respiration can be used for photosynthesis.
